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8/22/2019 Saisree Video Distribution
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Date: 24 Jan 2006
Presenter: Saisree Subramanian
Network infrastructure for IPTV
Copyright Wipro Technologies 2004 - 2006
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CONFIDENTIAL Copyright 2005 Wipro Ltd
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Agenda What is IPTV Market trends
Network infrastructure
How IPTV services work Case study on deployment
Challenges
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What is IPTV?IPTV is not TV that is broadcast over the Internet!
Thesecure and reliable deliveryto subscribers ofentertainment video and related services. These services mayinclude, for example, Live TV, Video On Demand (VOD) andInteractive TV (iTV). These services are delivered across anaccess-agnostic, packet-switched networkthat employs theIPprotocolto transport the audio, video and control signals. Incontrast to video over the public Internet, with IPTVdeployments, network security and performance aretightlymanagedto ensure asuperior entertainment experience,resulting in a compelling business environment for contentproviders, advertisers and customers alike.
(Source Alliance for Telecommunications Industry
Standards' (ATIS) IPTV Exploratory Group )
http://www.atis.org/http://www.atis.org/http://www.atis.org/http://www.atis.org/http://www.atis.org/PRESS/pressreleases2005/062705IIFbackgrounder.pdfhttp://www.atis.org/http://www.atis.org/PRESS/pressreleases2005/062705IIFbackgrounder.pdfhttp://www.atis.org/PRESS/pressreleases2005/062705IIFbackgrounder.pdfhttp://www.atis.org/http://www.atis.org/http://www.atis.org/http://www.atis.org/8/22/2019 Saisree Video Distribution
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Service offerings with IPTV Broadcast TV (subscription based)
Video on Demand
EPG (Electronic Program Guide)
Multi-room access
DVR (Digital video recording)
Photo sharing/video sharing
Additional bundling
y Music services (audio)
y Voice services (VOIP with add-on serviceslike call forwarding, caller id etc.)
y Data services (internet access)y Messaging services
Focus is on Quality of User Experience
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Analyst viewpoint
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Market info IPTV Equipment & Services Worldwide IPTV service revenue will grow to over $44 billion in 2009 IPTV services infrastructure capex will grow 1,377%, from $304 million to closeto $4.5 billion as providers look to IPTV services as the means of raising ARPUfrom a near-saturated broadband subscriber base The number of IPTV subscribers worldwide will grow to 53.7 million in 2009 IPTV subscriber growth is strong in all regions, especially in Asia Pacific, wherefaster forms of DSL like VDSL and ADSL2/2+ are stimulating subscriber growth The number of IPTV subscribers in North America will increase 12,985%between 2004 and 2009 DSL providers account for the bulk of IPTV service revenue now, but cablebroadband providers will also migrate to all-IP triple-play services in the nextfew years, possibly offering wireless services as well
"Service providers have been investing in IP DSLAMs, broadband edge routers, and aggregation switches to
prepare for IPTV in the network infrastructure layer, but are having to make significant investments in the
services layer too, adding video on demand servers, encoders, and headend equipment as well. But the biggest
decision they face right now is who to choose as a middleware partner."
- Richard Webb, Directing Analyst, Wireless Broadband & Mobile, Infonetics Research (lead author of the report)
Source: Report published by Infonetics Research Inc dated 15 Nov 2005
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Technical requirements on infrastructureproviders for delivery of IPTV Reliable access connectivity with assured bandwidth
Sufficient metro bandwidth to support continuous streamingtraffic
Support for both unicast & multicast traffic Intervention ability for authentication & authorization
Adequate accounting support for different services
Ensuring secure transmission which cannot be tapped by non-subscribers
Possibility of traffic prioritization and policing at the edge
The provider must support IPTV service delivery platforms
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Why is this different from traditional dataservices? Continuous stream with no fluctuations for the duration of the
stream
With a broadcast offering, a large number of customers will be
simultaneously using the servicey Overprovisioning access bandwidth may not work well
Caching mechanisms assume importance and there areincreased buffer requirements to allay problems due to
packetization packet loss, delay, jitter Multiple multicast streams with varying usage patterns
Engineering the network for video is a non-trivial problem and
requires understanding of IP networking as well as video services.
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Applicable standards ATIS IIF (IPTV interoperability forum) formed in mid-2005 and
chartered to standardize IPTV usage by telcos in USy 4 task forces - Architecture (ARCH), Digital Rights Management (DRM),
Quality of Service and Metrics (QoSM), and Testing and Interoperability (T&I)
y
Over 70 participating organizations both service providers and TEMs. China specific IPTV standards being defined by Ministry of Information
Industy and the state administration of Radio, Film and Television first release expected in early 2006
TMF catalyst project on IPTV FAB for TMW (Nice 2006)
Video encoding standards MPEG1, MPEG2, MPEG4 (from MPEGindustries forum), H.264 (from ITU)
TV standards HDTV and SDTV (from Consumer Electronic Association)
Streaming protocols RTP, RTSP (from IETF)
IP Multicast IGMP (from IETF)
QoS Diffserv/MPLS/802.1p (from IETF/IEEE)
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Existing datacom infrastructure &the impact of IPTV
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Current data network infrastructure
ONT
Provider backboneProvider backbone
Regional hub
Customerpremise
DSLAM
Modem
OLT
Consideringprevalent wirelineaccess technologies.Model is extensibleto WLAN andWiMAX.
PSTNProvider
edge
DSL variants ADSL, ADSL2+, VDSL Gigabit Ethernet Ethernet linkaggregation/priority/VLAN/VLAN stacking IGMP & IGMP snooping PIM-SM BRAS features (or co-located with BRAS)
Passive Optical Networking (PON) providing fiberto the premises/node/kerb
Distinction is on how near the customerfiber is available (rest over copper (ie) DSL)
Multiple PON standards APON (ATMencapsulation), EPON (Ethernet encapsulation),GPON (combination)
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Notes on bandwidth requirements
8 mbps19 mbpsHDTV
1.5 mbps3.5 mbpsSDTV
BW forMPEG4
BW forMPEG2Metro bandwidth
requirements for 1000users:
50 SDTV channels => 175
Mb
10 HDTV channels => 190Mb
1000 VOD users @ 3.5
mbps => 3500 Mb
Non-video traffic => 1000
Mb
Total 5 Gbps!
Last mile access bandwidth
requirements per user:
1 SDTV channel => 3.5 Mb
High Speed Internet => 1
Mb
Total 4.5 Mbps!
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Upgrades to existing data networkinfrastructure
Provider
edge
ONT
Regional hub
DSLAM
ModemOLT
Customerpremise
Provider backboneProvider backboneProvider backboneProvider backbone
Gigabit EthernetIP routingMulticast
MPLSSecurityClass based QoS &traffic grooming
Network upgrade Backbone capacity Metro capacity,multicast, redundancyProvider edge upgrade QoS, multicast, AAA
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Provider backboneProvider backbone
Provider
edge
ONT
Addition of video infrastructure
Regional hub
DSLAM
ModemOLT
STB
Customer
premise
Cache serverSupport for MPEG2, MPEG4, WMV9, H.264Support HDTV & SDTVPersistent storage for PVR, time shiftedVOD (push model)A/V interfaces as well as Ethernet, USB etcSoftware upgrade possibleNetwork manageable
Browser based PGApplication support for games, music etc
Video on Demand systemsLarge storage systemsAbility to support multipleparallel customer requests
Simultaneous requests inpoint-to-point modeDistributed architecturesfor scalability with
intelligent re-routing ofcontent
Broadcast headendAcquiring digital feed andencodingTranscoding (changing
from one encodingmechanism to another)Transrating (altering bitrateof encoding scheme)
Video mixing support forlocal content
Content protectionEncryption protection of stored andtransmitted videoDigital Rights Management (DRM)Implemented at headend as well asSTBDynamic algorithm change may be
supported for some specific content
IPTV middleware:
Responsible for the on-screen experienceElectronic program guide (EPG) - coveringbroadcast and on-demand contentSubscriber management system (SMS)
Content management and packagingincluding promos & trailers as well as advts.Content rating and pricingAudit trail and reporting functionsBusiness support system (BSS) interfaces ex. billing and payment functions
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How does it actually work? Pre-requisite network infrastructure
upgrades complete
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Step 1: Service provisioning by provider
Provider
edge
ONT
Regional hub
ModemOLT
Content Procurement
satellite feed, movies etc
Content packaging strategy
& regional differences Subscriber management
software setup
VoD server setup
Subscription TV channels
multicast
Customer
premise
Video
stream
available
Cache server
Provider backboneProvider backbone
DSLAM
STB
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Step 2: Customer opting for service
Provider
edge
ONT
Regional hub
ModemOLT
Customer
premise
Subscriber purchase of
package Subscriber provisioning
STB provisioning
AAA provisioning at PE
Cache server
Provider backboneProvider backbone
DSLAM
STB
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Step 3: Customer choosing broadcast channel
Provider
edge
ONT
Regional hub
ModemOLT
STB
IGMP join from STB to PE
Authentication
Multicast stream forwarded
to STB
Customer
premise
Cache server
Provider backboneProvider backbone
DSLAM
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Step 4: Customer changes broadcast channel
Provider
edge
ONT
Regional hub
ModemOLT
STB
Customer
premise
IGMP leave from STB to PE
Multicast stream
terminatedIGMP join from STB to PE
Authentication
Multicast stream forwarded
to STB
Cache server
Provider backboneProvider backbone
DSLAM
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Step 5: Customer opts for VoD service
Provider
edge
ONT
Regional hub
ModemOLT
STB
Customer
premise
VoD request to regional
hub
Authentication
Unicast Video stream to PE
Video stream forwarded toSTB
Stream controlled by
subscriber
Cache server
Provider backboneProvider backbone
DSLAM
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Deployment case study
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Case study: Now Broadband TV from PCCW Incumbent operator in Hongkong Pioneer in video based services (started in 2003) Network details
y Headend equipment from TUT & Tandberg (SDTV/MPEG2)y Headend equipment from Tandberg (HDTV/MPEG4)y Edge routers from Riverstone previously, now Juniper E-series broadband
service routers with SDX Service Deployment Systemy Core routers from Ciscoy DSLAM from NECy STB from Yuxingy Entones full suite of VoD/IPTV solutions including StreamLiner (NVR),
Encoding Studio (content ingestion workflow), Armada (intelligent assetmanager)
Service details (a la carte)y VoD
y Broadcast TV (Star, ESPN, specific local channels over 50 channels)y Gamingy Video conferencing
Minimum requirement of 6Mbps bandwidth per user Over 5,00,000 subscribers in Nov 2005
Note: This is based on data available on public websites
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In conclusion
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Technical challenges for delivery of IPTV Last mile access to customer
y Stable Broadband connectivity of at least 5-6 mbps required
AAA & securityy Customer receives the program as per his requirementy Provider is able to differentiate & charge for each servicey No unauthorised access to the service is possible
Quality of Experiencey Customer receives equal or better quality than alternative video
transmission mechanisms like cabley
Customer receives a newer and larger portfolio of services Peak usage problem
y Channel zap time
Network infrastructurey Network provider is able to incrementally add new infrastructure to
address service delivery requirements
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Thank You
Contact me at: [email protected]
mailto:[email protected]:[email protected]